Philip medaet



(No Model.)

P. MEDART. BELT TIGHTENING MBGHANISM.

No. 448,583. Patented Mar. 17, 1891.

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affiora e3.

UNTTED STATES PATENT EEIcE.

PHILIP MEDART, OF ST. LOUIS, MISSOURI, ASSIGN OR OF ONE-HALF TO IVILLIAM MEDART, OF SAME PLACE.

BELT-TIGHTENING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 448,583, dated March 17, 1891.

Application filed .Tuly '7, 1390. Serial No. 357,997. (No model.)

To all whom, it may con/cera: ent invention consist of rods having eithera Be it known that I-,PHILP MEDART, a citicirculansq nare, or othersuitable cross-section, zen ofthe'United States, and a resident of the with their ends securely attached in the procity of St. Louis, in the State of Missouri, jecting hubs 11 of the angle-brackets Zand 2,',

have invented certain new and useful Imso as to hold the parallel guides 1 a suitable 5 5 provements in Belt-Tightening Mechanism, of distance away from the wall or posts to which which the following` is a specification. the tightener is attached, and give sufficient This invention relates to mechanism for space for the movement of the guide bosses tightening the driving-belts of machinery, so or sleeves 12, arranged on the back of the carro as to increase the tension of the same and riage 3,and which surround the parallel guides 6o avoid slipping. and slide thereon in the movement of the car- The object of the present improvements is riage; and in the present invention said carto provide a tension mechanism in which are riage or frame will be of a bifurcated or saddle embodied the features of strength, simplicity, form, consisting of cross top member 13 and 15 and durability combined with ease of adjustpendent side members 14, to which the boxes 65 ment and capability of being used in either 5 of the tightening-pulley l are attached in a vertical, horizontal, or other position. I atthe following` improved manner: tain such object by the construction and ar- 15 is a circular yoke or hanger-frame havrangement of parts illustrated in the accoming a sole-plate 16, by which it is secured to 2o panying drawings, in whichits member 14, and a series of radially-ar- 7o Figure 1 is a front elevation of a belt-tightranged bosses 17, having screw-threaded oriening mechanism embodying my present imiices for the passage of the radially-arranged provements; Fig. 2, a side elevation of the bolts 18, by which the box is heldin place, and same, and Fig. 3 a detail side elevation illusits adjustment to a proper position is effected, tratng the adjustment of the boxes for ahorithe usual lock-nuts lf) being used to lock the 75 zontal use of the mechanism. bolts at their required adjustment in effect- Similar numerals of reference indicate like ing a parallel alignment of the pulley-shaft, parts in the several views. and a feature of the present invention is the As represented in the drawings, my imarrangement of such bolts in pairs at right 3o proved mechanism consists of parallel guides angles to each other, as shown, so that the self- 8o l, supported at their ends by angle-brackets oiling boxes 5, which are preferably employed 2and2 and forming aslideway for the frame in the present appliance, may be shifted or carriage 3, upon which the tightening-pularound from the position shown in Fig. 2 to ley et is supported in suitable boxes or bearthat shown in Fig. 3, when the appliance is 3 5 ings 5, an adjustment of the carriage upon changed from a Vertical to a horizontal posi- 85 the slideway being effected by a central screw tion, the object being to bring the reservoir G, bearing at its lower end against the carportion of the box into the proper horizontal riage, with its upper end arranged topass position. through a nut 7, arranged in a recessed hub Having thus fully described my said inven- 8, located centrally on the connecting-web 9, tion, what I claim as new, and desire to secure 9o that unites the two upper brackets 2 together, by Letters Patent, isas illustrated in Fig. 2. A suitable hand or l. A belt-tightening mechanism compriscapstan wheel 10 is secured to the screw 0 ing, in combination, a slidable carriage pronear its lower end for convenience in turning vided with guide-sleeves on its back, a tightthe screw to effect an adjustment. ching-pulley mounted in boxes thereon, a 9 5 In the present invention individual angleslidewayfor such carriage, consisting of parbrackets 2 are employed to support the lower allel guide-rods that pass through the guideends of the guides l, so thata clear wayfor the sleeves of the carriage and attaching anglecarriage 3 will be left at the lower end of the brackets that support the guide-rods in a po- 5o slideway. Theparallel guides lwill in thepressition away from the wall or posts, and an adlo:

justing-serew forming an adjustable connec- Ifion between the carriage and siideway, suhstantially as set forth.

2. A beit-tightening mechanism comprising, in combination, a slidnble Carriage provided with guide-s1eeves on its back, atight- I erung-pulley mounted in boxes thereon, a i slideway for such carringeonsisting of pzirl formed with L central hub for the adjustingserew, and an adjusting-screw forming an adjustalole Connection between the Carriage and siideway, Substantially as set forth.

n testimony whereof witness my hand this 30th day of June, 1890.

PHILIP MEDART.

aliel guide-rods that pass through the guidesleeves of the Carriage, individual lower angiebraekets, and connected upper angie-brackets In presence of- BENJ. A. SUPPAN, GUSTAVUS A. BUDER. 

